Y'know what I mean - about Covid infections.
There's an interesting artricle here from Rueters about the USS Roosevelt where the virus was able to infect a controlled and isolated population who were all then examined at tested for infection.
It seems that 60% of infections were asymptomatic among a young, healthy population.
OK, now another less solid statistic.
BBC Radio 4 PM show - you can stream it here - had an interview last night around 5.40ish with with an anonymous doctor working in a coronavirus ward. The interview was voiced to make it less traceable. She estimated that 20% of positive Covid cases, as in people clearly displaying the correct symptoms, would test negative first time using the PCR test for viral RNA, only getting a positive result on a second test.
And I'd like to roll in a third factor - a paper from the European Centre for Disease prevention and Control.
Basically it looks like some people may remain infectious for quite a bit longer than the 14 days currently used to quarantine potential infections. I recall discussing this online a few weeks ago with someone who was being a bit 'I work for the NHS and am therefore irrefutable' who was absolute in his conviction that 14 days was exactly enough because that was what he'd been told.
So putting this lot together, it's little wonder that despite the best efforts of many governments, Covid has been rampaging through various societies.
20-20 hindsight is a wonderful thing!